Bit of a vague one here, I've searched online and seen a couple of posts that mention the same error I'm getting, but none that answer why?

I've created a skin pack for DNN7 using a manifest file and it installs as expected, the first time! I make some changes to the skin files and update the manifest to a new version, try to install and all it tells me is:

As an aside, I can bypass this by uninstalling the skin pack first, but this doesn;t help if I make an update and push to a dev or live site, as I'd need to un-set everything before uninstalling.

Thanks,

Rick.

I used a SkinResources.zip in the package and found out it contained a manifest file (*.dnn).
while as there was(obviously) already one in the Skinpackage zip file.
After I removed the dnn file from the skin resources file, the package installed correctly..